# Creating multiblock structured grid nodes in Catalyst Adapter

**URL:** https://discourse.paraview.org/t/creating-multiblock-structured-grid-nodes-in-catalyst-adapter/2331
**Category:** ParaView Support
**Tags:** vtk
**Created:** [July 31, 2019, 4:27pm UTC](https://discourse.paraview.org/t/creating-multiblock-structured-grid-nodes-in-catalyst-adapter/2331 "2019-07-31T16:27:04Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![kschau](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/k/a5b964/32.png) [@kschau](https://discourse.paraview.org/u/kschau)
#### Post date: [July 31, 2019, 4:27pm UTC](https://discourse.paraview.org/t/creating-multiblock-structured-grid-nodes-in-catalyst-adapter/2331/1 "2019-07-31T16:27:04Z")

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I am attempting to implement Catalyst into a parallel, multiblock, structured grid solver (written in F90). I am beginning with the Catalyst-v5.6.1-Base-Enable-Python-Essentials-Extras.tar.gz package (which built just fine).

I am looking for some guidance as to the best way to implement the node values x,y,z (each being a 3D array from the Fortran solver) into the points of the vtkStructuredGrid

My current understanding is that it should look something like

> create vtkMultiBlockDataset  
> set all blocks to null  
> \*\*\*create an array from (x,y,z) \*\*\*  
> create vtkPoints from array  
> create vtkStructuredGrid from vtkPoints  
> set current block to vtkStructuredGrid  
> SetGrid of CoProcessorData() as vtkMultiBlockDataSet

Where I am struggling is how to create the appropriate array from (x,y,z) given what ships with the Catalyst Python Essentials Extras package I am starting with.

I may be totally wrong about my workflow in which case I am all ears. But this is what I could parse together.

Thanks!

Kyle

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### Author: ![kschau](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/k/a5b964/32.png) [@kschau](https://discourse.paraview.org/u/kschau)
#### Post date: [August 7, 2019, 10:21pm UTC](https://discourse.paraview.org/t/creating-multiblock-structured-grid-nodes-in-catalyst-adapter/2331/2 "2019-08-07T22:21:27Z")

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The only way I found to do this was to flatten the arrays in fortran, then iterate over them in the CxxAdapter to set them to a vtkPointsArray